對(dui)梨(li)莖(jing)蜂(feng)防(fang)治(zhi),一(yi)般(ban)采(cai)取(qu)花(hua)期(qi)用(yong)藥(yao)殺(sha)成(cheng)蟲(chong)。人(ren)工(gong)捕(bu)捉(zhuo)成(cheng)蟲(chong),掛(gua)粘(zhan)蟲(chong)板(ban)捕(bu)殺(sha)成(cheng)蟲(chong)。人(ren)工(gong)剪(jian)除(chu)蛀(zhu)梢(shao),梢(shao)內(nei)藥(yao)物(wu)毒(du)殺(sha)幼(you)蟲(chong)等(deng)。對(dui)梨(li)莖(jing)蜂(feng)成(cheng)蟲(chong)的(de)防(fang)治(zhi)。在(zai)成(cheng)蟲(chong)羽(yu)化(hua)時(shi)。人(ren)工(gong)一(yi)早(zao)一(yi)晚(wan)捕(bu)殺(sha),能(neng)起(qi)到(dao)一(yi)定(ding)效(xiao)果(guo)。但(dan)梨(li)園(yuan)麵(mian)積(ji)大(da)時(shi),勞(lao)動(dong)力(li)緊(jin)張(zhang),不(bu)太(tai)容(rong)易(yi)實(shi)現(xian)及(ji)時(shi)滅(mie)蟲(chong)。介(jie)紹(shao)兩(liang)個(ge)梨(li)優(you)良(liang)品(pin)種(zhong)近(jin)年(nian)來(lai)掛(gua)黃(huang)色(se)粘(zhan)蟲(chong)板(ban)捕(bu)殺(sha)梨(li)莖(jing)蜂(feng)成(cheng)蟲(chong),效(xiao)果(guo)不(bu)錯(cuo),但(dan)粘(zhan)蟲(chong)板(ban)附(fu)近(jin)的(de)枝(zhi)梢(shao)仍(reng)被(bei)蛀(zhu)食(shi)·qitabuweiyeduoyoubeizhu。changyoulijingfengweihaiyiduanshijianhoucaibeizhandao,xiaoguodalezhekou。guazhanchongbanxuyaodamianjilianfangliangua,niannianguacainengqudejiaohaofangxiao。duilijingfengweihaijiaoweiyanzhongdeyuanpian,chengchongliangjiaoda,zaichengchongyuhuafengqipensajuzhileiyaojidushachengchong,yenengqidaojiaohaofangxiao。jianqingweihai。yaohouxuzhuyirengongfuzhushoufen,tigaozuoguolv。duiyichanluanhouzhushidelijingfengyouchongdefangzhi,yiqianduocaiyongrengongjianchuzhushao,duixiaolishunengqidaojiaohaoxiaoguo,kejianqingxianianchongliang。danduichengniandalishujiaonan,youyushutigaoda,jianchubuyichedi,lainianrengweihaiyanzhong,haixuyaochengpianyuanlianfanglianjian,yijiabujianzeweihaiquanpian。wochangyiqianduoyongyanghualeguoshamielijingfengchongluan、幼(you)蟲(chong),比(bi)較(jiao)徹(che)底(di)幹(gan)淨(jing),一(yi)年(nian)防(fang)好(hao),此(ci)後(hou)幾(ji)年(nian)危(wei)害(hai)都(dou)輕(qing)。但(dan)由(you)於(yu)氧(yang)化(hua)樂(le)果(guo)為(wei)劇(ju)毒(du)農(nong)藥(yao),已(yi)在(zai)果(guo)樹(shu)上(shang)禁(jin)用(yong),連(lian)續(xu)多(duo)年(nian)又(you)沒(mei)有(you)找(zhao)到(dao)替(ti)代(dai)氧(yang)化(hua)樂(le)果(guo)的(de)藥(yao)劑(ji),光(guang)靠(kao)人(ren)工(gong)捕(bu)蟲(chong)剪(jian)梢(shao)。用(yong)工(gong)量(liang)大(da),效(xiao)果(guo)不(bu)太(tai)好(hao),梨(li)莖(jing)蜂(feng)危(wei)害(hai)逐(zhu)年(nian)加(jia)重(zhong)。
2010年我場用新煙堿類殺蟲劑啶蟲脒防冶梨二叉蚜時,發現蛀梢內梨莖蜂幼蟲逐漸停止發育、萎縮死亡的現象(而同類型殺蟲劑吡蟲啉沒有這個效果)。2011年我場又在梨園開花後用第2遍藥(花後20d左右),用20%啶蟲脒粉劑6000倍液防冶梨二叉蚜、菜蚜、黃蚜時,專門調查對梨莖蜂的防效,結果藥後5d幼蟲停止蛀食,停止生長;藥後10d幼蟲萎縮逐漸死亡,而對照處的幼蟲肥壯,將要蛀到2年生部位;藥後15d蛀梢內幼蟲死亡率98%以上。這一發現能解決梨莖蜂防冶的一大難題,梨星毛蟲防治方法且啶蟲脒對梨木虱若蟲、綠盲蝽、小葉蟬均有一定防效,可起到一舉多得。事半功倍的效果。廣大果農朋友,不防在2012年春防治梨二叉蚜時用啶蟲脒,不但能防治蚜蟲,還能對梨莖蜂有出人意料的效果,再結合人工防治、掛粘蟲板殺滅梨莖蜂成蟲及在冬季修剪時再剪除殺死個別活著的幼蟲或蛹,定能取得防治梨莖蜂的最佳效果。
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